# possible to represent with this clock class).
cc = self._create_clock_class(frequency=1, offset=bt2.ClockClassOffset(10000))
sc = tc.create_stream_class(default_clock_class=cc,
# possible to represent with this clock class).
cc = self._create_clock_class(frequency=1, offset=bt2.ClockClassOffset(10000))
sc = tc.create_stream_class(default_clock_class=cc,